Torsional Rigidity

[v7guy]

when building something like this you need to take in to account alot more than just the hieght of the material. The width is going to be just as important both from the standpoint of ergonomics and strength. Thought I would bring it up in case it wasn't just a typo in your last post.

If you haven't I would consider doing some reading. There are some really good books out there.

[ramz69ss]

i'm guessing he was looking at some cobra kit car frames,and thought he would ask what people think,,,i'm sure, he is not thinking about using it for a complete frame,,just the main rails

[wendell]

disclaimer: I'm not a mechanical engineer.



I've always been under the impression that EVERY purpose built road race chassis is built from square/rectangular tubing because it yeilds a more rigid chassis.

It may be due to construction techniques that flat faces allow e.g. sheer plates. Either way, you won't find a T/A, Datona, AGT, GTS... car built out of round tubing.

[killer_datsun]

it was close to what ramz69ss said, just something that was fairly close to being the same physical size so a comparison could be more easily made. However there is going to be a cage on the chassis at least 12 points probably more though. I have Herb Adams book "Chassis Engineering" and Fred Puhn's book "How To Make Your Car Handle" so this question is just another part of my research.

[redss86]

With that many points, I think you could get away w/ 2x2 square. If you are worried about it, the biggest I would go w/ on that many points is 2x3. Most of your strength will be in the cage itself.

Again, just my .02